地浸采铀中珠形微生物氧化剂研究  

The Global Microbe-Oxidant of In-Situ Leaching of Uranium

作　　者：胡鄂明[1] 谭凯旋[1] 史文革[1] 刘乃忠[2] 

机构地区：[1]南华大学核资源与安全工程学院,湖南衡阳421001 [2]核工业北京化工冶金研究院,北京101149

出　　处：《南华大学学报（自然科学版）》2007年第2期20-23,33,共5页Journal of University of South China：Science and Technology

基　　金：湖南省教育厅重点资助项目(03A042)

摘　　要：采用生物细胞固定化技术将氧化亚铁硫杆菌制备成珠形微生物氧化剂．其特性为：氧化亚铁硫杆菌在珠体内浓度达每毫升4×10^10个细胞，珠体直径0．5～2．5mm，珠体上的平均孔径8．0×10^-9m．用其在固定化细胞流化床反应器中处理模拟地浸吸附尾液，可将其中的Fe^2＋离子氧化为Fe^3＋离子，氧化-还原电位从310mV提高到550mV，调整酸度后即可用于浸出．珠形微生物氧化剂是酸法地浸采铀工艺中很有发展前途的新型氧化剂．The thiobacillus ferrooxidans are immobilized in the polymerized bead by the immobilization technology of biology cell in this paper. The bead containing thiobacillus ferrooxidans is defined as a golbal microbe-oxidant. Its characteristics can be described form three points. Its number of thiobacillus ferrooxidans in a milliliter is 4 × 10^10. Its average diameter is 0.5 ～ 2.5 ram. And the average diameter of the hole in the beads is 8.0 × 10^-9 m. The solution after absorption in in - situ leaching of uranium is simulated in the lab. And the simulative solution is oxidized by the global microbe -oxidant in the fluidized bed reactor. Then Fe^2＋ in the simulative solution is oxidized into Fe^3＋. The Oxidation - Reduction Potential of the solution can be lifted from 310 mV to 550 mV. The treated solution can be used in lixiviating after adjusting acidity. The global microbe - oxidant is a new kind of oxidant with a brightfuture in the technique of acidic in - situ leaching of uranium.

关 键 词：珠形微生物氧化剂 细胞固定化 原地浸出 铀 氧化亚铁硫杆菌 

分 类 号：TL212[核科学技术—核燃料循环与材料]